IT199CA Misc. Notes:
Control Point 10504 appears to be missing. I suggest we use the Geodimeter 640 to "point" towards the point to see if in fact it is a victim of bluff erosion.

Overview

Metropolitan Santa Cruz Beach Surveys

Its Beach, Santa Cruz, CA
11 January 1999, 1245 to1400 (PST)

Synopsis

A beach and nearshore topographic survey consisting of one shore-normal profile and one shore-parallel line (wet/dry line) was conducted.
The profile was extended offshore into the surf zone utilizing a swimming rodman.

The total station was set up on the west side of the bluff overlooking Its Beach, between the guardrail and the edge of the cliff. The SECO level rods, in conjunction with the level-rod support tripods were placed on the control points and pointed towards the total station.
Program 10 (site setup) was performed on the total station
Program 20 (station establishment) was performed on the total station using option "Unknown Station Location", utilizing Control Points 10501, 10503, and 10505.
Program 4 (UTM) was used to collect control and topo points
Control Points: 10505, 10501, and 10503 10502 were surveyed (Fast Standard mode)
The Wet/Dry line was surveyed using the EXP3 stadia rod (Tracking mode)
The Profile was surveyed using the EXP3 stadia rod (Tracking mode) and carried offshore into the surf zone. Due to large waves and dangerous currents, the profile was not carried to the maximum limit of the stadia rod, offshore.
Control Point 10502 was surveyed with the short EXTR stadia, in a hand-held manner (Fast Standard mode)
Gretchen Luepke sketched the beach.
Thomas E. Reiss operated the total station and photographed the area.
Justin Friesner was the rodman

Field Observations

High tide waves appear to reach all the way to the cliff. The wet/dry line
was limited to just the highest portions of the beach near the cliff. Control Point 10504 "Platform" appears to be missing.

Post-processing

Survey data was downloaded from the Total Station memory (JOB file is automatically is created).
Raw file was used to generate a PTS file (UTM coordinates are extracted from the original file) Note: no recalculation is performed on the original file)
PFCODE.EXE was used to generate an ED file
The ED file was edited to include necessary Program 10 information, Points block listing, and necessary INFO codes. Field procedures were checked and corrected if necessary
PFGD.EXE was used to generate a Cartesian-based, XYZ file (PF) from the ED file
Extraneous lines were removed from the PF file to generate a DAT file (relative XYZ coordinates)
Data values from the DAT file were put into GRIDCON.XLS (ITS.XLS, sheet 990111C) to convert the relative XYZ Cartesian system to UTM.
UTM values were extracted from ITS.XLS (UTM file) and compared to field observations (PTS file) to check for discrepancies.
UTM data was plotted in plan and profile views using SigmaPlot (v. 4.0)
Digital images were inserted into a MS WORD document and described (IMAGE.TXT file)

Precision and Accuracy of Acquired Data

Program 20 (Station Establishment)

Standard Deviation (Northing): 0.010 m

Standard Deviation (Easting): 0.007 m

Standard Deviation (Combined): 0.007 m

Standard Deviation (Elevation): 0.001 m

Siting on Control Points: (distance dependent, based on spread of values)

99011110: View of Its Beach from atop the cliff point separating the two sandy beaches that make up Its Beach. View looking east. Note the stairs leading down to the beach.

A control point was placed on the stairs near the bottom.

99011111: View of Its Beach from atop the bluff overlooking the beach, looking east-southeast. A control point was placed in the wave-cut platform

observable in the image (left-top) but has subsequently been removed by cliff erosion. Also note the Lighthouse in the background. Earlier total station surveys used the top lightning rod as the HA azimuth reference angle.

99011112: View of the Geodimeter location. The instrument was set up on the bluff

erlooking the beach. Note the location of the Life-Ring at the top of the stairs. A control point

ts directly below the Life Ring. An additional control point was placed on the walking path on the opposite side of the stairs.